▎ 摘　　要

NOVELTY - The electrode (100) has a first electrode lead (10) that is provided with a first lead portion (11) which is entered when implanting organism along implanted lead electrode. One or more electrode contacts (20) cover first electrode lead, and comprise first conductive layer (21) and coating layer (22). The first conductive layer is covered on outer side wall of first electrode lead. The coating layer is coated on outer side wall of first conductive layer. The material of coating layer is reversible electrochemical reaction material. The coating layer comprises of iridium oxide, titanium nitride, titanium carbide, ruthenium oxide, tantalum oxide, platinum, carbon nano tube, nano-crystalline diamond, graphene, conductive polymer or conductive hydrogel. The coating layer is iridium oxide layer. The electrolyte solution is formed by adding ammonium hexachloroplatinate and sodium hexachlororite in aqueous solution or chloric acid solution. USE - Implantable lead electrode for sacral nerve stimulator (claimed), used for regulating activities of internal organs such as intestine, bladder, and heart of human body. ADVANTAGE - The charge carrier does not leave permanently away from the metal surface at time of reversible electrochemical reaction, so the balance of charge in the metal and tissue can be maintained. Obvious tissue damage and/or electrode corrosion at the interface between the electrode and the tissue can be avoided when electrical pulse stimulation is applied through the pulse generator. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the implantable lead electrode. DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of implantable lead electrode. Electrode lead (10) Lead portion (11) Electrode contact (20) Conductive layer (21) Coating layer (22) Implantable lead electrode (100)